IEEE C80216m-09/1502
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Proposed AWD Text on the Ranging Channels (AWD-15.3.9.1.4/15.3.9.2.4)
Date
Submitted
2009-07-06
Source(s)
HyunWoo Lee, Jin Sam Kwak, HanGyu
Cho, Young-Hyoun Kwon
Voice: +82-31-450-7902
E-mail: camille@lge.com, samji@lge.com,
hgcho@lge.com
LG Electronics
Re:
IEEE 80216m-09/0028r1, “Call for Comments and Contributions on Project 802.16m
Amendment Content”
AWD-15.3.9.1.4/15.3.9.2.4
Abstract
This contribution proposes the text of ranging channel section to be included in the IEEE
802.16m AWD.
Purpose
To be discussed and adopted by TGm for the IEEE 802.16m AWD
Notice
Release
Patent
Policy
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contained herein.
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Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and
<http://standards.ieee.org/board/pat>.
Proposed AWD Text on the Ranging Channels
(AWD-15.3.9.1.4/15.3.9.2.4)
HyunWoo Lee, Jin Sam Kwak, HanGyu Cho, and Young-Hyoun Kwon
LG Electronics
1. Introduction
This contribution proposes the text of ranging channel section to be included in IEEE 802.16m AWD [1]. The
proposed text is developed in order to be readily combined with IEEE Std 802.16-2009 [2]. It is also based on
the proposed text in [3-6] as compliant to the 802.16m SRD [7] and the 802.16m SDD [8]. The details of
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IEEE C80216m-09/1502
consideration on the ranging channels are addressed in [6].
Reference
[1] IEEE 802.16m-09/0010r2, “IEEE 802.16m Amendment Working Document,” June 2009.
[2] IEEE Std 802.16-2009, “IEEE Standard for Local and metropolitan area networks: Part 16: Air Interface for
Broadband Wireless Access Systems,” May 2009.
[3] IEEE C802.16m-09/1091r1, “Considerations on the Non-Synchronized Ranging Channels,” April 2009.
[4] IEEE 802.16m-09/1093, “Proposed AWD Text on the Ranging Codes for Non-synchronized AMSs,” April
2009.
[5] IEEE C802.16m-09/1094, “Proposed AWD Text on the Ranging Configurations for Non-synchronized
AMSs,” April 2009.
[6] IEEE C802.16m-09/1501, “Considerations on the Ranging Channels (AWD-15.3.9.1.4/15.3.9.2.4),” July
2009.
[7] IEEE 802.16m-07/002r8, “IEEE 802.16m System Requirements,” January 2009.
[8] IEEE 802.16m-08/003r9a, “IEEE 802.16m System Description Document,” May 2009.
Text proposal for inclusion in the 802.16m amendment
[
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[Bracketed Italic text]: Informative
------------------------------------------------------------------------- Text Start -------------------------------------------------------------------------[Modify the following text in the 15.3.9.1.4.1 Ranging Channel Structure for Non-synchronized AMSs]
15.3.9.1.4.1.
Ranging Channel Structure for Non-synchronized AMSs
The ranging channel for non-synchronized AMSs is used for initial network entry and association and for
ranging against a target BS during handover.
A physical ranging channel for non-synchronized AMSs consists of the ranging preamble (RP) with length of
TRP depending on the ranging subcarrier spacing ∆fRP, and the ranging cyclic prefix (RCP) with length of TRCP in
the time domain.
A ranging channel occupies a localized bandwidth corresponding to the 1 subband.
Power control operation described in subclause [TBD] applies to ranging signal transmission.
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IEEE C80216m-09/1502
time
copy samples
copy samples
RP2
RP1
TRCP
TRP
copy samples
TRCP
copy samples
RP3
TRP
RP4
TRP
TRCP
TRP
TRCP
Structure 4
Figure illustrates the ranging channel structures in the time domain.
time
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TRCP
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TRCP
TRP
TRP
(a) Structure 1
time
copy samples
TRCP
TRP
(b) Structure 2
time
copy samples
TRP
TRCP
(c) Structure 3
time
copy samples
copy samples
RP2
RP1
TRCP
TRP
copy samples
TRCP
copy samples
RP3
TRP
TRCP
TRP
RP4
TRCP
TRP
(d) Structure 4
Figure 500 - The ranging channel structures in the time domain
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IEEE C80216m-09/1502
Error! Reference source not found. contains ranging channel formats and parameters.
Table 721 - Ranging Channel Formats and Parameters
Format No.
Ranging Channel Structure
TRCP
TRP
0
Structure 1
1
Structure 3
2
∆fRP
Tg + k×Tb (a)
2×Tb
Structure 2
m×Tg + n×Tb (b)
2×2×Tb (c)
3
Structure 3
7×Tg + Tb
8×Tb
∆f / 8
4
Structure 4
Tg
Tb
∆f
∆f / 2
where Ts, Tb, Tg and ∆f are defined in Section 15.3.2.4 Derived parameters.
(a): The TRCP for Formats 0 and 1 depends on OFDMA parameters, subframe types as follows:


k    N sym  Ts  2  TRP  Tg   / 3  Fs  / N FFT


Nsym is the number of OFDMA symbols in a subframe as defined in Section 15.3.8.1 Physical and
logical resource unit. Fs and NFFT are defined in Section 15.3.2.4 Derived parameters.
(b): The TRCP for Formats 2 depends on OFDMA parameters, subframe types as follows:
m   N sym  1 / 2
n   N sym  4  / 2
Nsym is the number of OFDMA symbols in a subframe as defined in Section 15.3.8.1 Physical and
logical resource unit.
(cb): TRP for Format 2 denotes the total length of repeated ranging preamble.
In the ranging channel Format 0, the repeated RCPs and RPs are used as a single time ranging opportunity
time
copy samples
copy samples
RP2
RP1
T
T
copy samples
T
T
copy samples
RP3
T
T
RP4
T
T
RP
RCP
RP
RCP
RP
RP
RCP
RCP
within a subframe in
Structure 4
Figure (a). Format 2 consists of a single RCP and repeated RPs within a subframe. Format 1 consists of a
single RCP and RP which is a part of the Format 0. When Format 1 is used, there are two time opportunities
within a subframe. Format 3 has the same structure with Forma 1 but its length is different. RP1, RP2, RP3, and
RP4 in Format 4 are constructed by the first portion, second portion, third portion, and the last portion of the
ranging sequences [the detail is TBD depending on the ranging sequences], respectively.
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IEEE C80216m-09/1502
When the ranging channel format is configured as Format 0, 2, 3, 4, or Format 1 using the first time-opportunity
in the time domain, the transmission start time of the ranging channel is aligned with the UL subframe start time
at the AMS. For the Format 1 using the second time-opportunity, the transmission of the ranging channel starts
at TRCP+TRP in Format 1 after the start time of first time-opportunity.
------------------------------------------------------------------------- Text End ---------------------------------------------------------------------------
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---------------------------------------------------------------------------------------------------------------------------------------------------------------Black text: current text in the subclause 15.3.9.1.4 Ranging channel of [1]
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[Bracketed Italic text]: Informative
------------------------------------------------------------------------- Text Start -------------------------------------------------------------------------[add the following text in the bottom of 15.3.9.1.4.1 Ranging Channel Structure for Non-synchronized AMSs]
< Option 1 >
When frame structure is supporting the WirelessMAN-OFDMA MSs in UL PUSC zone by FDM manner as
defined in 15.3.3.4, the ranging channel structure for WirelessMAN-OFDMA MSs is used for AMSs with
different code set. Within the UL PUSC subchannels allocated for WirelessMAN-OFDMA MSs, the first 2 UL
symbols are occupied for the structure in Figure 253 (8.4.7.1 Initial ranging and HO ranging transmissions) for
AMS initial/handover ranging and the last 1 symbol is occupied for the structure in Figure 255(8.4.7.2 Periodic
ranging and BR transmissions) for AMS periodic ranging. The ranging channel for FDM-based UL PUSC Zone
Support is composed of 6 DRUs by using the symbol structure defined in 15.3.8.3.5.1 Basic Symbol Structure
for FDM based UL PUSC Zone Support.
Figure xxx. Ranging channel structures and allocations for FDM-based UL PUSC Zone Support
[Add the following text at the bottom of ‘15.3.9.2.4.1 ranging preamble codes’ (before‘15.3.9.2.4.2 Ranging channel
configurations’)]
When frame structure is supporting the WirelessMAN-OFDMA MSs in UL PUSC zone by FDM manner as
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IEEE C80216m-09/1502
defined in 15.3.3.4, the ranging codes for WirelessMAN-OFDMA in the 8.4.7.3 Ranging codes are used and
assigned for AMSs with different codes in order to distinguish between WirelessMAN-OFDMA MS and AMS.
Using the seed of PRBS generator and the last code index used by WirelessMAN-OFDMA MSs, SAMS, is
indicated by S-SFH as defined by SAMS = 144×((N+M+L+O+S) mod 256) as described in 8.4.7.3 Ranging codes.
The length of ranging code is 144 for FDM-based UL PUSC Zone Support.
— The first NAMS codes produced are for initial ranging. Clock the PRBS generator 144 × (SAMS mod 256)
times to 144 × ((SAMS + NAMS) mod 256) – 1 times.
— The next MAMS codes produced are for periodic ranging. Clock the PRBS generator 144 × ((NAMS +
SAMS) mod 256) times to 144 × ((NAMS + MAMS + SAMS) mod 256) – 1 times.
— The next OAMS codes produced are for HO ranging. Clock the PRBS generator 144 × ((NAMS + MAMS +
SAMS) mod 256) times to 144 × ((NAMS + MAMS + OAMS + SAMS) mod 256) – 1 times.
<Option 2>
When frame structure is supporting the WirelessMAN-OFDMA MSs in UL PUSC zone by FDM manner as
defined in 15.3.3.4, the ranging channel for AMSs is allocated in the UL PUSC zone for AMSs. The ranging
channel for FDM-based UL PUSC Zone Support is composed of 4 DRUs by using the symbol structure defined
in 15.3.8.3.5.1 Basic Symbol Structure for FDM based UL PUSC Zone Support.. Within the allocated
subchannels for AMSs, first 4 symbols in a UL subframe are occupied for the initial/handover ranging structure
in Figure 254 (8.4.7.1 Initial ranging and HO ranging transmissions). The last 2 symbols in the same UL
subframe are occupied for the periodic ranging in Figure 253 (8.4.7.1 Initial ranging and HO ranging
transmissions).
Figure xxx. Ranging channel structures and allocations for FDM based UL PUSC Zone Support
[Add the following text at the bottom of ‘15.3.9.2.4.1 ranging preamble codes’ (before‘15.3.9.2.4.2 Ranging channel
configurations’)]
When frame structure is supporting the WirelessMAN-OFDMA MSs in UL PUSC zone by FDM manner as
defined in 15.3.3.4, the ranging codes for WirelessMAN-OFDMA in the 8.4.7.3 Ranging codes are used and
assigned for AMSs with different codes in order to distinguish between WirelessMAN-OFDMA MS and AMS.
Using the seed of PRBS generator and the last code index used by WirelessMAN-OFDMA MSs, SAMS, is
indicated by S-SFH as defined by SAMS = 144×((N+M+L+O+S) mod 256) as described in 8.4.7.3 Ranging codes.
The length of ranging code is 96 for FDM based UL PUSC Zone Support.
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IEEE C80216m-09/1502
— The first NAMS codes produced are for initial ranging. Clock the PRBS generator 96 × (SAMS mod 256)
times to 96 × ((SAMS + NAMS) mod 256) – 1 times.
— The next MAMS codes produced are for periodic ranging. Clock the PRBS generator 96 × ((NAMS +
SAMS) mod 256) times to 96 × ((NAMS + MAMS + SAMS) mod 256) – 1 times.
— The next OAMS codes produced are for HO ranging. Clock the PRBS generator 96 × ((NAMS + MAMS +
SAMS) mod 256) times to 96 × ((NAMS + MAMS + OAMS + SAMS) mod 256) – 1 times.
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---------------------------------------------------------------------------------------------------------------------------------------------------------------Black text: current text in the subclause 15.3.9.1.4 Ranging channel of [1]
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[Bracketed Italic text]: Informative
------------------------------------------------------------------------- Text Start -------------------------------------------------------------------------[Modify the following text in the 15.3.9.1.4.2 Ranging Channel Structure for synchronized AMSs]
15.3.9.1.4.1.
Ranging Channel Structure for synchronized AMSs
The ranging channel for synchronized AMSs is used for periodic ranging. Only the AMSs that are already
synchronized to the target ABS are allowed to transmit the periodic ranging signal.
The physical structure in the ranging channel for synchronized AMSs is the same with the physical ranging
channel for non-synchronized AMSs. The ranging preamble codes in 15.3.9.2.4.1 is used for synchronized
AMSs by allocating different codes from non-synchronized AMSs.
Power control operation described in subclause [TBD] applies to ranging signal transmission.
------------------------------------------------------------------------- Text End ---------------------------------------------------------------------------
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------------------------------------------------------------------------ Text Start -------------------------------------------------------------------------[Modify the following text in the top of ‘15.3.9.2.4 Ranging channel’.]
15.3.9.2.4.
15.3.9.2.4.1.
Ranging channel
Ranging channel for non-synchronized AMSs
15.3.9.2.4.1.1 Ranging preamble codes
The ranging preamble codes are classified into initial ranging and handover ranging preamble codes. The initial
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IEEE C80216m-09/1502
ranging preamble codes shall be used for initial network entry and association. Handover ranging preamble
codes shall be used for ranging against a target ABS during handover. For a ranging code opportunity, each
AMS randomly chooses one of the ranging preamble codes from the available ranging preamble codes set in a
cell.
The Zadoff-Chu sequences with cyclic shifts are used for the ranging preamble codes. The pth ranging preamble
code xp(k) is defined by
r k  k  1  2  k  s  NCS 

x p  k   exp   j  
 , k  0,1,..., N RP  1
N
RP


(xxx)
where
p
is the index for pth ranging preamble code which is made as the sth cyclic shifted sequence from
the root index r of Zadoff-Chu sequence.
NCS
is the unit of cyclic shift according to the cell size and is defined in Table yyy.
NRP
is the length of ranging preamble codes and it defined by NRP =139 for ranging channel Format
0, 1, and 2 in Table 721 and NRP =557 for ranging channel Format 3 in Table 721.
Table yyy. The unit of cyclic shift
index
0
1
2
3
4
5
6
7
8
NCS
9
10
11
12
13
14
15
0
[Exact values is TBD except the last index (0 denotes no cyclic shift).]
The root index of ZC code, the unit of cyclic shift, and number of code for each purpose (initial, handover, and
periodic ranging) are broadcasted by S-SFH. There are NTOTAL (=NIN + NHO + NPE) preamble codes available in a
sector where NIN, NHO, and NPE are the number of codes for initial, handover, and periodic ranging, respectively.
The code set is found with the root index and available cyclic shifts of ZC code indicated by SFH in the order of
increasing cyclic shift from the allocated root index. If NTOTAL preamble codes can not be generated from the
index, the remaining code set is found sequentially by using all the available cyclic shifts of a ZC code with the
increased root index until the NTOTAL preamble codes are met. When the increased root index is NZC, the
increased root index is set to 1.
[Insert the subclause number as follow:]
15.3.9.2.4.1.2 Ranging channel configurations
[Insert the subclause number as follow:]
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IEEE C80216m-09/1502
15.3.9.2.4.1.3 Ranging signal transmission
<<Eqn. UL- 7>>Equation 243 specifies the transmitted signal voltage to the antenna, as a function of time, during ranging channel
format 0, 1, 2 or 3.
…
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------------------------------------------------------------------------ Text Start -------------------------------------------------------------------------[Modify the following text in the middle of ‘15.3.9.2.4 Ranging channel’.]
15.3.9.2.5.
15.3.9.2.5.1.
Ranging channel
Ranging channel for non-synchronized AMSs
15.3.9.2.4.1 Ranging preamble codes
The ranging preamble codes are classified into initial ranging and handover ranging preamble codes. The initial
ranging preamble codes shall be used for initial network entry and association. Handover ranging preamble
codes shall be used for ranging against a target ABS during handover. For a ranging code opportunity, each
AMS randomly chooses one of the ranging preamble codes from the available ranging preamble codes set in a
cell.
[Insert the subclause number as follow:]
15.3.9.2.4.2 Ranging channel configurations
The information for ranging time/frequency resource allocation is indicated by the S-SFH. The ranging channel
configuration information in the S-SFH consists of the frame-period (PF) and subframe-period (PSF) with
subframe-offset (OSF) for ranging resource allocation in the time domain, and the starting subband position (k0)
in the units of subband for ranging allocation in the frequency domain. Within a superframe, the ranging
channels are allocated from the PFth frame in every frame (0th, 1st, 2nd, and 3rd frame) if PF=0, at every odd frame
(1st, 3rd frame) if PF=1, or at only one frame (2nd frame) if PF=2. Within the allocated frame, (PSF+1) ranging
channels are allocated from the OSFth UL subframe with period of PSF in the FDD mode. In the TDD mode, the
ranging channels are allocated in the consecutive PSF subframes from the OSFth UL subframe. The start subframe
index, SSF, for ranging channel allocation in the frame are obtained by Equation xxx

  N SF /  PSF  1   k  OSF , for FDD
S SF   
, k  0,1,..., PSF
N

N

O

k
,
for
TDD

UL
SF
 SF
(xxx)
where NSF is the minimum number of subframes among frames and the number of subframes per frame is
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IEEE C80216m-09/1502
defined in the subclause 15.3.3.1. Basic Frame Structure. For the TDD, NUL is the number of UL subframes
such as 2, 3, 4, or 5 for 6:2, 5:3, 4:4, or 3:5 DL:UL ratio, respectively.
Table xxx shows the ranging channel configurations, which is indicated by the S-SFH.
Table xxx. Ranging channel configurations
Configuration No.
PF
PSF
No. of ranging channel per
superframe
0
0
0
4
1
0
1
8
2
1
0
2
3
2
0
1
The occupied resource for a ranging channel is defined as Nr1 subframes by Nr2 subbands. For Format 0, 1, and
2, Nr1 = 1. For Format 3, Nr1 = 3. The unit of Nr2 is 1 subband for all ranging formats. Figure zzz shows an
example of ranging channel allocation.
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IEEE C80216m-09/1502
Figure zzz. The example of ranging channel allocation in time domain for FDD and TDD modes.
When the ranging channel is Format 1, each AMS randomly selects one of 2 time opportunities in the subframe.
Each AMS randomly selects a code-opportunity from the available ranging code set in a sector defined in
Subclause 15.3.9.2.4.1.1 Ranging preamble codes.
[Insert the subclause number as follow:]
15.3.9.2.4.3 Ranging signal transmission
<<Eqn. UL- 7>>Equation 243 specifies the transmitted signal voltage to the antenna, as a function of time, during ranging channel
format 0, 1, 2 or 3.
…
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